Math

Math is a built-in object that has properties and methods for mathematical constants and functions. Not a function object.

Description

Unlike the other global objects, Math is not a constructor. All properties and methods of Math are static. You refer to the constant pi as Math.PI and you call the sine function as Math.sin(x), where x is the method's argument. Constants are defined with the full precision of real numbers in JavaScript.

Properties

Math.E: Euler's constant and the base of natural logarithms, approximately 2.718.
Math.LN2: Natural logarithm of 2, approximately 0.693.
Math.LN10: Natural logarithm of 10, approximately 2.303.
Math.LOG2E: Base 2 logarithm of E, approximately 1.443.
Math.LOG10E: Base 10 logarithm of E, approximately 0.434.
Math.PI: Ratio of the circumference of a circle to its diameter, approximately 3.14159.
Math.SQRT1_2: Square root of 1/2; equivalently, 1 over the square root of 2, approximately 0.707.
Math.SQRT2: Square root of 2, approximately 1.414.

Methods

Note that the trigonometric functions (sin(), cos(), tan(), asin(), acos(), atan(), atan2()) expect or return angles in radians. To convert radians to degrees, divide by (Math.PI / 180), and multiply by this to convert the other way.

Note that a lot of the math functions have a precision that's implementation-dependent. This means that different browsers can give a different result, and even the same JS engine on a different OS or architecture can give different results.

Math.abs(x): Returns the absolute value of a number.
Math.acos(x): Returns the arccosine of a number.
Math.asin(x): Returns the arcsine of a number.
Math.atan(x): Returns the arctangent of a number.
Math.atan2(y, x): Returns the arctangent of the quotient of its arguments.
Math.ceil(x): Returns the smallest integer greater than or equal to a number.
Math.cos(x): Returns the cosine of a number.
Math.exp(x): Returns E^x, where x is the argument, and E is Euler's constant (2.718…), the base of the natural logarithm.
Math.floor(x): Returns the largest integer less than or equal to a number.
Math.log(x): Returns the natural logarithm (log_e, also ln) of a number.
Math.max([x[, y[, …]]]): Returns the largest of zero or more numbers.
Math.min([x[, y[, …]]]): Returns the smallest of zero or more numbers.
Math.pow(x, y): Returns base to the exponent power, that is, base^exponent.
Math.random(): Returns a pseudo-random number between 0 and 1.
Math.round(x): Returns the value of a number rounded to the nearest integer.
Math.sin(x): Returns the sine of a number.
Math.sqrt(x): Returns the positive square root of a number.
Math.tan(x): Returns the tangent of a number.
Math.toSource(): Returns the string "Math".

Created by Mozilla Contributors and licensed under CC-BY-SA 2.5

DroidScript

Math

Description

Properties

Methods